cubepath
OLL Parity (4×4): One edge pair on the last layer is flipped over — its two halves show the side colour on top. No 3×3 can reach this

OLL Parity (4×4)

One edge pair on the last layer is flipped over — its two halves show the side colour on top. No 3×3 can reach this

4×4 parity4×4probability 1/2

Algorithm

Rw U2 x Rw U2 Rw U2 Rw' U2 Lw U2 Rw' U2 Rw U2 Rw' U2 Rw'

OLL Parity (4×4) case diagram
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